Low-threshold cavitation in water using IR laser pulse trains

Appl Opt. 2008 Jul 10;47(20):3549-54. doi: 10.1364/ao.47.003549.

Abstract

The low-temperature cavitational disruption by trains of laser pulses was demonstrated in water. The trains used in the experiment were generated by a Raman laser at a wavelength of 1626 nm. The mean value of the fragmentation threshold energy density per pulse in a train was estimated to be equal to 7.2x10(6) J/m(3). The corresponding amplitude of the negative pressure had the order of 6-7 bars at a temperature jump of only about 2 degrees C. This result opens up prospects for developing precision nonthermal cavitational laser surgery.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Dose-Response Relationship, Radiation
  • Gases / chemistry*
  • Gases / radiation effects*
  • Infrared Rays
  • Laser Therapy*
  • Lasers*
  • Microbubbles
  • Pressure
  • Radiation Dosage
  • Water / chemistry*

Substances

  • Gases
  • Water